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• W2146649546 abstract "The physical effects of monoacylglycerols (MAG) in small unilamellar vesicles composed of phosphatidyl- choline (PC), triolein, cholesterol, and varying amounts of monopalmitin and monoolein were studied by 13C-NMR. The signal to noise ratio of the carbonyls of PC and triolein were enhanced by the addition of 1,2di-( 1-W)palmitoylphospha- tidylcholine and tri-( 1-W)oleoylglycerol. The linewidths of the carbonyl- 42, choline methyl, olefinic carbon, and termi- nal methyl resonances were measured digitally from vesicles with 0 to 42 mol % of MAG. Significant increases in the linewidth of carbonyl (P < 0.05), olefinic and terminal methyl carbons (P < 0.01) of vesicles containing 42 mol % mo- nopalmitin indicated that these groups experienced re- stricted molecular mobility at high monopalmitin concentra- tions. However, more striking was the apparent displacement of triolein from the surface environment of PC bilayers to an oil-like environment in systems containing only 8 mol % monopalmitin. Displacement of triolein from the surface by monoolein occurred only above 15 mol %. Thus, saturated and monounsaturated monoacylglycerols, natural products of lipoprotein metabolism, dynamically alter both the lipid composition and molecular mobility of lipoprotein surfaces in distinct ways.-Boyle, E., D. M. Small, D. Gantz, J. A. Hamilton, and J. B. German. Monoacylglycerols alter the lipid composition and molecular mobility of phosphatidyl- choline bilayers: I3C NMR evidence of dynamic lipid remod- eling. J. Lipid Res. 1996. 37: 764-772. Monoacylglycerols (MAG) are major intermediates in fat metabolism. 2-Monoacylglycerols (BMAG), along with fatty acids, are produced by acyl position-specific triacylglycerol hydrolases during both the absorption of fat and the metabolism of triglyceride-rich lipoprotein particles. The primary form of dietary fat, triglyceride, is hydrolyzed at the 1- and 3-ester linkages of the glycerol backbone to yield fatty acids and 2-MAG by a combina- tion of gastric and pancreatic lipases (reviewed in ref. 1). Diglycerides are also substrates for the hydrolases, and the end products of lipolysis are 2-MAG and fatty acids. During fat absorption, most of the 2-MAG pro- duced are subsequently used as substrates for the resyn- thesis of triglyceride (2). The resynthesis takes place in the enterocytes, where the triglyceride is then packaged into chylomicra for transport to the circulatory system" @default.
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• W2146649546 title "Monoacylglycerols alter the lipid composition and molecular mobility of phosphatidylcholine bilayers: 13C NMR evidence of dynamic lipid remodeling" @default.
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• W2146649546 doi "https://doi.org/10.1016/s0022-2275(20)37574-x" @default.
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